Basic Electrical and Electronics Engineering: Unit III: Analog Electronics

Field Effect Transistors (FET)

Advantages, Classification

The FET is a three terminal semiconductor device in which the current flow through the conduction region is controlled by an electric field.

FIELD EFFECT TRANSISTORS

● The FET is a three terminal semiconductor device in which the current flow through the conduction region is controlled by an electric field.

● FET is also known as Voltage controlled device, since the flow of current in the output side is controlled by Input voltage

● The operation of the FET depends on the majority carrier alone. So it is called Unipolar device.


Advantages of FET:-

● Thermally more stable.

● It is immune to radiation.

● No offset voltage occurs.

● Due to its high input impedance, it is preferred for amplifiers.

● Less space is required and less noisy.


Classification of FET:-

FET is classified into two types.

(i) Junction field effect transistor (JFET)

(ii) Metal oxide semiconductor Field effect semiconductor(MOSFET)

Basic Electrical and Electronics Engineering: Unit III: Analog Electronics : Tag: : Advantages, Classification - Field Effect Transistors (FET)